Accession Number:

AD0411581

Title:

VARIABLE ENERGY GAP DEVICES

Descriptive Note:

Final technical summary rept. 1 May 1962-30 Apr 1963

Corporate Author:

EAGLE-PICHER RESEARCH LAB MIAMI OK

Report Date:

1963-06-14

Pagination or Media Count:

79.0

Abstract:

Fabrication and evaluation of variable energy gap structures of two categories was conducted shallow devices with 1 to 3 microns of sur face GaP, and deep devices of 6 to 40 microns depth. Shallow variable gap devices exhibited essentially equal photovoltaic properties as sin gle gap conventional devices, and demonstrate ad vantages in ruggedness, spectral response, and a numerically small temperature performance. Initial deep variable gap structures indicated severe compensation from diffusion of impurities during the phosphorus diffusion. Source of these impurities was determined to be the phosphorus. Recent devices fabricated with high purity phosphorus produced competitive, although lower, photovoltaic properties. Significant spectral response differences were observed in these devices. Informative zinc diffusion studies and data are presented. A proposed method of quick, high tem perature zinc diffusion is discussed. Evaluation of diode characteristics, spectral response, photovoltaic properties and temperature performance is reported. GaP synthesis by two methods was achieved and described.

Subject Categories:

  • Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE